Abstract
Experimental studies have been carried out to investigate the effect of flame stabilizer geometry on flame structure, combustion efficiency, emissions for confined turbulent premixed flames using blended fuels. Three blended fuels and stabilizer with three solidity ratios are used to define the optimum flame stabilizer geometry satisfying better flame structure and combustion efficiency of premixed flames. It is found that increase of light diesel fuel in blended fuel increases UHC and CO due to the decrease of flame temperature for different solidity ratios. Increase of solidity ratio, increases flame temperature and CO 2 but decreases UHC, H 2 and CO for each blend. Recirculation zone length increases with the increase of solidity ratio and is not affected by the light diesel concentration in blends. The merging distance “ L” and oscillation frequency behind perforated plate are proportional to the hole diameter. The solidity ratio affects the local equivalence ratio mainly in the main reaction zone. It increases with the increase of solidity ratio and decrease of light diesel in blends. The burning rate and the completeness of combustion increase with the increase of solidity ratio and decrease of light diesel concentration in blends, and they have steeper values in the main reaction zone and vice versa in post flame zone.
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